./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-validator-v0.8/linux-stable-a450319-1-144_2a-drivers--input--tablet--acecad.ko-entry_point_ldv-val-v0.8.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d001a1a2-972a-4af1-9a2a-7491f21868b3/bin/utaipan-verify-t7M7D8N6sZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d001a1a2-972a-4af1-9a2a-7491f21868b3/bin/utaipan-verify-t7M7D8N6sZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d001a1a2-972a-4af1-9a2a-7491f21868b3/bin/utaipan-verify-t7M7D8N6sZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d001a1a2-972a-4af1-9a2a-7491f21868b3/bin/utaipan-verify-t7M7D8N6sZ/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-validator-v0.8/linux-stable-a450319-1-144_2a-drivers--input--tablet--acecad.ko-entry_point_ldv-val-v0.8.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d001a1a2-972a-4af1-9a2a-7491f21868b3/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d001a1a2-972a-4af1-9a2a-7491f21868b3/bin/utaipan-verify-t7M7D8N6sZ --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 07ae4eb392cc9822cbd398c1edf107cccc60d6668bc59dbf5a692a6b9350873b --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 05:17:27,626 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 05:17:27,748 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d001a1a2-972a-4af1-9a2a-7491f21868b3/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-11-19 05:17:27,757 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 05:17:27,758 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 05:17:27,797 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 05:17:27,798 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 05:17:27,799 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 05:17:27,800 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 05:17:27,805 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 05:17:27,805 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-19 05:17:27,806 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-19 05:17:27,807 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-19 05:17:27,808 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-19 05:17:27,809 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-19 05:17:27,809 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-19 05:17:27,809 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-19 05:17:27,810 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-19 05:17:27,810 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-19 05:17:27,811 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-19 05:17:27,811 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-19 05:17:27,812 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-19 05:17:27,813 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 05:17:27,813 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 05:17:27,813 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 05:17:27,814 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 05:17:27,814 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 05:17:27,815 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 05:17:27,815 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 05:17:27,815 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 05:17:27,816 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 05:17:27,817 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 05:17:27,817 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 05:17:27,817 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 05:17:27,818 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 05:17:27,818 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 05:17:27,818 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 05:17:27,818 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-19 05:17:27,818 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 05:17:27,819 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 05:17:27,819 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-19 05:17:27,819 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 05:17:27,819 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d001a1a2-972a-4af1-9a2a-7491f21868b3/bin/utaipan-verify-t7M7D8N6sZ/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d001a1a2-972a-4af1-9a2a-7491f21868b3/bin/utaipan-verify-t7M7D8N6sZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 07ae4eb392cc9822cbd398c1edf107cccc60d6668bc59dbf5a692a6b9350873b [2023-11-19 05:17:28,151 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 05:17:28,179 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 05:17:28,182 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 05:17:28,183 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 05:17:28,184 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 05:17:28,185 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d001a1a2-972a-4af1-9a2a-7491f21868b3/bin/utaipan-verify-t7M7D8N6sZ/../../sv-benchmarks/c/ldv-validator-v0.8/linux-stable-a450319-1-144_2a-drivers--input--tablet--acecad.ko-entry_point_ldv-val-v0.8.cil.out.i [2023-11-19 05:17:31,331 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 05:17:31,826 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 05:17:31,828 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d001a1a2-972a-4af1-9a2a-7491f21868b3/sv-benchmarks/c/ldv-validator-v0.8/linux-stable-a450319-1-144_2a-drivers--input--tablet--acecad.ko-entry_point_ldv-val-v0.8.cil.out.i [2023-11-19 05:17:31,872 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d001a1a2-972a-4af1-9a2a-7491f21868b3/bin/utaipan-verify-t7M7D8N6sZ/data/5bc88aa6c/943609e8306a42208f396d6725b24d42/FLAGb2ef8c751 [2023-11-19 05:17:31,892 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d001a1a2-972a-4af1-9a2a-7491f21868b3/bin/utaipan-verify-t7M7D8N6sZ/data/5bc88aa6c/943609e8306a42208f396d6725b24d42 [2023-11-19 05:17:31,895 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 05:17:31,897 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 05:17:31,898 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 05:17:31,898 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 05:17:31,905 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 05:17:31,906 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:17:31" (1/1) ... [2023-11-19 05:17:31,908 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@53a61e41 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:17:31, skipping insertion in model container [2023-11-19 05:17:31,908 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:17:31" (1/1) ... [2023-11-19 05:17:32,017 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 05:17:32,949 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d001a1a2-972a-4af1-9a2a-7491f21868b3/sv-benchmarks/c/ldv-validator-v0.8/linux-stable-a450319-1-144_2a-drivers--input--tablet--acecad.ko-entry_point_ldv-val-v0.8.cil.out.i[113497,113510] [2023-11-19 05:17:33,021 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 05:17:33,051 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 05:17:33,295 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d001a1a2-972a-4af1-9a2a-7491f21868b3/sv-benchmarks/c/ldv-validator-v0.8/linux-stable-a450319-1-144_2a-drivers--input--tablet--acecad.ko-entry_point_ldv-val-v0.8.cil.out.i[113497,113510] [2023-11-19 05:17:33,321 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 05:17:33,364 INFO L206 MainTranslator]: Completed translation [2023-11-19 05:17:33,365 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:17:33 WrapperNode [2023-11-19 05:17:33,365 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 05:17:33,366 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 05:17:33,367 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 05:17:33,367 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 05:17:33,374 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:17:33" (1/1) ... [2023-11-19 05:17:33,423 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:17:33" (1/1) ... [2023-11-19 05:17:33,541 INFO L138 Inliner]: procedures = 107, calls = 319, calls flagged for inlining = 47, calls inlined = 41, statements flattened = 850 [2023-11-19 05:17:33,541 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 05:17:33,542 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 05:17:33,542 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 05:17:33,543 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 05:17:33,552 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:17:33" (1/1) ... [2023-11-19 05:17:33,553 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:17:33" (1/1) ... [2023-11-19 05:17:33,562 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:17:33" (1/1) ... [2023-11-19 05:17:33,563 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:17:33" (1/1) ... [2023-11-19 05:17:33,600 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:17:33" (1/1) ... [2023-11-19 05:17:33,607 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:17:33" (1/1) ... [2023-11-19 05:17:33,613 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:17:33" (1/1) ... [2023-11-19 05:17:33,619 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:17:33" (1/1) ... [2023-11-19 05:17:33,630 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 05:17:33,631 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 05:17:33,631 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 05:17:33,631 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 05:17:33,632 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:17:33" (1/1) ... [2023-11-19 05:17:33,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 05:17:33,650 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d001a1a2-972a-4af1-9a2a-7491f21868b3/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:17:33,663 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d001a1a2-972a-4af1-9a2a-7491f21868b3/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 05:17:33,702 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d001a1a2-972a-4af1-9a2a-7491f21868b3/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 05:17:33,712 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2023-11-19 05:17:33,712 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2023-11-19 05:17:33,712 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 05:17:33,712 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2023-11-19 05:17:33,712 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2023-11-19 05:17:33,713 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2023-11-19 05:17:33,713 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2023-11-19 05:17:33,713 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2023-11-19 05:17:33,713 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2023-11-19 05:17:33,715 INFO L130 BoogieDeclarations]: Found specification of procedure strlcat [2023-11-19 05:17:33,715 INFO L138 BoogieDeclarations]: Found implementation of procedure strlcat [2023-11-19 05:17:33,716 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 05:17:33,716 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2023-11-19 05:17:33,716 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2023-11-19 05:17:33,716 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2023-11-19 05:17:33,716 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2023-11-19 05:17:33,717 INFO L130 BoogieDeclarations]: Found specification of procedure usb_acecad_disconnect [2023-11-19 05:17:33,717 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_acecad_disconnect [2023-11-19 05:17:33,717 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2023-11-19 05:17:33,717 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2023-11-19 05:17:33,718 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-19 05:17:33,718 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-19 05:17:33,719 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-19 05:17:33,719 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 05:17:33,720 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2023-11-19 05:17:33,720 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2023-11-19 05:17:33,720 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-19 05:17:33,721 INFO L130 BoogieDeclarations]: Found specification of procedure input_set_abs_params [2023-11-19 05:17:33,721 INFO L138 BoogieDeclarations]: Found implementation of procedure input_set_abs_params [2023-11-19 05:17:33,721 INFO L130 BoogieDeclarations]: Found specification of procedure usb_free_coherent [2023-11-19 05:17:33,721 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_free_coherent [2023-11-19 05:17:33,722 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_set_intfdata_7 [2023-11-19 05:17:33,722 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_set_intfdata_7 [2023-11-19 05:17:33,723 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-19 05:17:33,723 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 05:17:33,723 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-19 05:17:33,724 INFO L130 BoogieDeclarations]: Found specification of procedure printk [2023-11-19 05:17:33,724 INFO L138 BoogieDeclarations]: Found implementation of procedure printk [2023-11-19 05:17:33,724 INFO L130 BoogieDeclarations]: Found specification of procedure warn_slowpath_null [2023-11-19 05:17:33,724 INFO L138 BoogieDeclarations]: Found implementation of procedure warn_slowpath_null [2023-11-19 05:17:33,724 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2023-11-19 05:17:33,725 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2023-11-19 05:17:33,725 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 05:17:33,725 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 05:17:33,725 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 05:17:34,074 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 05:17:34,076 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 05:17:34,209 INFO L767 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2023-11-19 05:17:35,073 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 05:17:35,544 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 05:17:35,544 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-19 05:17:35,551 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:17:35 BoogieIcfgContainer [2023-11-19 05:17:35,551 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 05:17:35,554 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 05:17:35,554 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 05:17:35,557 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 05:17:35,557 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 05:17:31" (1/3) ... [2023-11-19 05:17:35,558 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c7021ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:17:35, skipping insertion in model container [2023-11-19 05:17:35,558 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:17:33" (2/3) ... [2023-11-19 05:17:35,559 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c7021ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:17:35, skipping insertion in model container [2023-11-19 05:17:35,559 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:17:35" (3/3) ... [2023-11-19 05:17:35,561 INFO L112 eAbstractionObserver]: Analyzing ICFG linux-stable-a450319-1-144_2a-drivers--input--tablet--acecad.ko-entry_point_ldv-val-v0.8.cil.out.i [2023-11-19 05:17:35,582 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 05:17:35,582 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 05:17:35,633 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 05:17:35,640 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@2b924bd7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-19 05:17:35,640 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 05:17:35,644 INFO L276 IsEmpty]: Start isEmpty. Operand has 167 states, 105 states have (on average 1.4095238095238096) internal successors, (148), 117 states have internal predecessors, (148), 44 states have call successors, (44), 17 states have call predecessors, (44), 16 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) [2023-11-19 05:17:35,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-19 05:17:35,652 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:17:35,653 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:17:35,654 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:17:35,659 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:17:35,659 INFO L85 PathProgramCache]: Analyzing trace with hash 875896144, now seen corresponding path program 1 times [2023-11-19 05:17:35,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:17:35,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328034365] [2023-11-19 05:17:35,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:17:35,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:17:35,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:17:36,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:17:36,239 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:17:36,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328034365] [2023-11-19 05:17:36,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328034365] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:17:36,240 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:17:36,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 05:17:36,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47056326] [2023-11-19 05:17:36,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:17:36,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:17:36,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:17:36,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:17:36,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:17:36,302 INFO L87 Difference]: Start difference. First operand has 167 states, 105 states have (on average 1.4095238095238096) internal successors, (148), 117 states have internal predecessors, (148), 44 states have call successors, (44), 17 states have call predecessors, (44), 16 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-19 05:17:37,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:17:37,175 INFO L93 Difference]: Finished difference Result 469 states and 652 transitions. [2023-11-19 05:17:37,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:17:37,179 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 23 [2023-11-19 05:17:37,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:17:37,192 INFO L225 Difference]: With dead ends: 469 [2023-11-19 05:17:37,192 INFO L226 Difference]: Without dead ends: 293 [2023-11-19 05:17:37,197 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:17:37,201 INFO L413 NwaCegarLoop]: 191 mSDtfsCounter, 193 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-19 05:17:37,202 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [193 Valid, 366 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-19 05:17:37,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2023-11-19 05:17:37,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 293. [2023-11-19 05:17:37,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 191 states have (on average 1.3403141361256545) internal successors, (256), 199 states have internal predecessors, (256), 72 states have call successors, (72), 30 states have call predecessors, (72), 29 states have return successors, (67), 67 states have call predecessors, (67), 67 states have call successors, (67) [2023-11-19 05:17:37,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 395 transitions. [2023-11-19 05:17:37,283 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 395 transitions. Word has length 23 [2023-11-19 05:17:37,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:17:37,283 INFO L495 AbstractCegarLoop]: Abstraction has 293 states and 395 transitions. [2023-11-19 05:17:37,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-19 05:17:37,284 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 395 transitions. [2023-11-19 05:17:37,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-11-19 05:17:37,287 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:17:37,288 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:17:37,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 05:17:37,288 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:17:37,289 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:17:37,289 INFO L85 PathProgramCache]: Analyzing trace with hash 1699433758, now seen corresponding path program 1 times [2023-11-19 05:17:37,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:17:37,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617434998] [2023-11-19 05:17:37,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:17:37,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:17:37,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:17:37,744 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-19 05:17:37,744 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:17:37,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617434998] [2023-11-19 05:17:37,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617434998] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:17:37,745 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:17:37,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 05:17:37,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895480777] [2023-11-19 05:17:37,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:17:37,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:17:37,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:17:37,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:17:37,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:17:37,750 INFO L87 Difference]: Start difference. First operand 293 states and 395 transitions. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-19 05:17:38,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:17:38,624 INFO L93 Difference]: Finished difference Result 503 states and 665 transitions. [2023-11-19 05:17:38,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:17:38,624 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 39 [2023-11-19 05:17:38,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:17:38,635 INFO L225 Difference]: With dead ends: 503 [2023-11-19 05:17:38,635 INFO L226 Difference]: Without dead ends: 500 [2023-11-19 05:17:38,639 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:17:38,644 INFO L413 NwaCegarLoop]: 176 mSDtfsCounter, 138 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 349 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-19 05:17:38,648 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 349 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-19 05:17:38,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2023-11-19 05:17:38,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 480. [2023-11-19 05:17:38,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 480 states, 317 states have (on average 1.3280757097791798) internal successors, (421), 331 states have internal predecessors, (421), 112 states have call successors, (112), 51 states have call predecessors, (112), 50 states have return successors, (107), 105 states have call predecessors, (107), 107 states have call successors, (107) [2023-11-19 05:17:38,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 480 states to 480 states and 640 transitions. [2023-11-19 05:17:38,737 INFO L78 Accepts]: Start accepts. Automaton has 480 states and 640 transitions. Word has length 39 [2023-11-19 05:17:38,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:17:38,738 INFO L495 AbstractCegarLoop]: Abstraction has 480 states and 640 transitions. [2023-11-19 05:17:38,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-19 05:17:38,738 INFO L276 IsEmpty]: Start isEmpty. Operand 480 states and 640 transitions. [2023-11-19 05:17:38,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-11-19 05:17:38,740 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:17:38,741 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:17:38,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 05:17:38,741 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:17:38,742 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:17:38,742 INFO L85 PathProgramCache]: Analyzing trace with hash 1142844290, now seen corresponding path program 1 times [2023-11-19 05:17:38,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:17:38,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197739467] [2023-11-19 05:17:38,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:17:38,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:17:38,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:17:39,027 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-19 05:17:39,028 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:17:39,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197739467] [2023-11-19 05:17:39,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197739467] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:17:39,029 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:17:39,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 05:17:39,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129984099] [2023-11-19 05:17:39,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:17:39,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:17:39,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:17:39,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:17:39,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:17:39,032 INFO L87 Difference]: Start difference. First operand 480 states and 640 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-19 05:17:39,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:17:39,775 INFO L93 Difference]: Finished difference Result 482 states and 641 transitions. [2023-11-19 05:17:39,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:17:39,776 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 40 [2023-11-19 05:17:39,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:17:39,781 INFO L225 Difference]: With dead ends: 482 [2023-11-19 05:17:39,782 INFO L226 Difference]: Without dead ends: 479 [2023-11-19 05:17:39,782 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:17:39,784 INFO L413 NwaCegarLoop]: 174 mSDtfsCounter, 196 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-19 05:17:39,784 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [196 Valid, 174 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-19 05:17:39,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2023-11-19 05:17:39,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 479. [2023-11-19 05:17:39,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 479 states, 317 states have (on average 1.3249211356466877) internal successors, (420), 330 states have internal predecessors, (420), 111 states have call successors, (111), 51 states have call predecessors, (111), 50 states have return successors, (107), 105 states have call predecessors, (107), 107 states have call successors, (107) [2023-11-19 05:17:39,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 479 states to 479 states and 638 transitions. [2023-11-19 05:17:39,837 INFO L78 Accepts]: Start accepts. Automaton has 479 states and 638 transitions. Word has length 40 [2023-11-19 05:17:39,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:17:39,837 INFO L495 AbstractCegarLoop]: Abstraction has 479 states and 638 transitions. [2023-11-19 05:17:39,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-19 05:17:39,838 INFO L276 IsEmpty]: Start isEmpty. Operand 479 states and 638 transitions. [2023-11-19 05:17:39,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-11-19 05:17:39,840 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:17:39,840 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:17:39,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 05:17:39,841 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:17:39,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:17:39,841 INFO L85 PathProgramCache]: Analyzing trace with hash 1068444833, now seen corresponding path program 1 times [2023-11-19 05:17:39,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:17:39,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443487799] [2023-11-19 05:17:39,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:17:39,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:17:39,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:17:40,081 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-19 05:17:40,082 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:17:40,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443487799] [2023-11-19 05:17:40,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443487799] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:17:40,083 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:17:40,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 05:17:40,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947842040] [2023-11-19 05:17:40,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:17:40,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:17:40,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:17:40,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:17:40,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:17:40,085 INFO L87 Difference]: Start difference. First operand 479 states and 638 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-19 05:17:40,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:17:40,444 INFO L93 Difference]: Finished difference Result 481 states and 639 transitions. [2023-11-19 05:17:40,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:17:40,445 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 41 [2023-11-19 05:17:40,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:17:40,449 INFO L225 Difference]: With dead ends: 481 [2023-11-19 05:17:40,450 INFO L226 Difference]: Without dead ends: 478 [2023-11-19 05:17:40,450 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:17:40,452 INFO L413 NwaCegarLoop]: 172 mSDtfsCounter, 193 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 05:17:40,452 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [193 Valid, 172 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 05:17:40,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2023-11-19 05:17:40,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 478. [2023-11-19 05:17:40,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 317 states have (on average 1.3217665615141956) internal successors, (419), 329 states have internal predecessors, (419), 110 states have call successors, (110), 51 states have call predecessors, (110), 50 states have return successors, (107), 105 states have call predecessors, (107), 107 states have call successors, (107) [2023-11-19 05:17:40,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 636 transitions. [2023-11-19 05:17:40,537 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 636 transitions. Word has length 41 [2023-11-19 05:17:40,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:17:40,538 INFO L495 AbstractCegarLoop]: Abstraction has 478 states and 636 transitions. [2023-11-19 05:17:40,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-19 05:17:40,539 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 636 transitions. [2023-11-19 05:17:40,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-11-19 05:17:40,541 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:17:40,541 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:17:40,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 05:17:40,542 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:17:40,542 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:17:40,542 INFO L85 PathProgramCache]: Analyzing trace with hash -1237933467, now seen corresponding path program 1 times [2023-11-19 05:17:40,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:17:40,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548119929] [2023-11-19 05:17:40,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:17:40,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:17:40,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:17:40,638 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-19 05:17:40,638 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:17:40,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548119929] [2023-11-19 05:17:40,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548119929] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:17:40,639 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:17:40,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 05:17:40,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112454788] [2023-11-19 05:17:40,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:17:40,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:17:40,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:17:40,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:17:40,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:17:40,641 INFO L87 Difference]: Start difference. First operand 478 states and 636 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-19 05:17:41,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:17:41,015 INFO L93 Difference]: Finished difference Result 480 states and 637 transitions. [2023-11-19 05:17:41,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:17:41,017 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 42 [2023-11-19 05:17:41,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:17:41,020 INFO L225 Difference]: With dead ends: 480 [2023-11-19 05:17:41,021 INFO L226 Difference]: Without dead ends: 477 [2023-11-19 05:17:41,021 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:17:41,022 INFO L413 NwaCegarLoop]: 170 mSDtfsCounter, 190 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 05:17:41,023 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [190 Valid, 170 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 05:17:41,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 477 states. [2023-11-19 05:17:41,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 477 to 477. [2023-11-19 05:17:41,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 317 states have (on average 1.3186119873817035) internal successors, (418), 328 states have internal predecessors, (418), 109 states have call successors, (109), 51 states have call predecessors, (109), 50 states have return successors, (107), 105 states have call predecessors, (107), 107 states have call successors, (107) [2023-11-19 05:17:41,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 634 transitions. [2023-11-19 05:17:41,069 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 634 transitions. Word has length 42 [2023-11-19 05:17:41,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:17:41,070 INFO L495 AbstractCegarLoop]: Abstraction has 477 states and 634 transitions. [2023-11-19 05:17:41,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-19 05:17:41,070 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 634 transitions. [2023-11-19 05:17:41,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-19 05:17:41,072 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:17:41,072 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:17:41,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-19 05:17:41,073 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:17:41,073 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:17:41,073 INFO L85 PathProgramCache]: Analyzing trace with hash 278788132, now seen corresponding path program 1 times [2023-11-19 05:17:41,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:17:41,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339701249] [2023-11-19 05:17:41,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:17:41,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:17:41,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:17:41,160 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-19 05:17:41,161 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:17:41,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339701249] [2023-11-19 05:17:41,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339701249] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:17:41,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:17:41,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 05:17:41,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828108946] [2023-11-19 05:17:41,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:17:41,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:17:41,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:17:41,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:17:41,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:17:41,163 INFO L87 Difference]: Start difference. First operand 477 states and 634 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-19 05:17:41,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:17:41,886 INFO L93 Difference]: Finished difference Result 479 states and 635 transitions. [2023-11-19 05:17:41,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:17:41,887 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 43 [2023-11-19 05:17:41,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:17:41,891 INFO L225 Difference]: With dead ends: 479 [2023-11-19 05:17:41,892 INFO L226 Difference]: Without dead ends: 470 [2023-11-19 05:17:41,892 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:17:41,893 INFO L413 NwaCegarLoop]: 169 mSDtfsCounter, 187 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-19 05:17:41,894 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [187 Valid, 169 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-19 05:17:41,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2023-11-19 05:17:41,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 470. [2023-11-19 05:17:41,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 311 states have (on average 1.315112540192926) internal successors, (409), 321 states have internal predecessors, (409), 108 states have call successors, (108), 51 states have call predecessors, (108), 50 states have return successors, (107), 105 states have call predecessors, (107), 107 states have call successors, (107) [2023-11-19 05:17:41,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 624 transitions. [2023-11-19 05:17:41,946 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 624 transitions. Word has length 43 [2023-11-19 05:17:41,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:17:41,946 INFO L495 AbstractCegarLoop]: Abstraction has 470 states and 624 transitions. [2023-11-19 05:17:41,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-19 05:17:41,947 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 624 transitions. [2023-11-19 05:17:41,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2023-11-19 05:17:41,951 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:17:41,952 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:17:41,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-19 05:17:41,952 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:17:41,952 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:17:41,953 INFO L85 PathProgramCache]: Analyzing trace with hash -1140037954, now seen corresponding path program 1 times [2023-11-19 05:17:41,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:17:41,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322019516] [2023-11-19 05:17:41,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:17:41,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:17:42,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:17:42,175 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-11-19 05:17:42,175 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:17:42,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322019516] [2023-11-19 05:17:42,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322019516] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:17:42,176 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:17:42,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 05:17:42,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597170072] [2023-11-19 05:17:42,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:17:42,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:17:42,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:17:42,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:17:42,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:17:42,178 INFO L87 Difference]: Start difference. First operand 470 states and 624 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 2 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2023-11-19 05:17:42,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:17:42,699 INFO L93 Difference]: Finished difference Result 769 states and 1020 transitions. [2023-11-19 05:17:42,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:17:42,700 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 2 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 115 [2023-11-19 05:17:42,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:17:42,703 INFO L225 Difference]: With dead ends: 769 [2023-11-19 05:17:42,703 INFO L226 Difference]: Without dead ends: 310 [2023-11-19 05:17:42,704 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:17:42,705 INFO L413 NwaCegarLoop]: 166 mSDtfsCounter, 31 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-19 05:17:42,706 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 322 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-19 05:17:42,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2023-11-19 05:17:42,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 305. [2023-11-19 05:17:42,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 212 states have (on average 1.330188679245283) internal successors, (282), 217 states have internal predecessors, (282), 60 states have call successors, (60), 33 states have call predecessors, (60), 32 states have return successors, (59), 58 states have call predecessors, (59), 59 states have call successors, (59) [2023-11-19 05:17:42,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 401 transitions. [2023-11-19 05:17:42,732 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 401 transitions. Word has length 115 [2023-11-19 05:17:42,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:17:42,733 INFO L495 AbstractCegarLoop]: Abstraction has 305 states and 401 transitions. [2023-11-19 05:17:42,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 2 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2023-11-19 05:17:42,733 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 401 transitions. [2023-11-19 05:17:42,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2023-11-19 05:17:42,735 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:17:42,735 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:17:42,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-19 05:17:42,736 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:17:42,736 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:17:42,736 INFO L85 PathProgramCache]: Analyzing trace with hash -916308079, now seen corresponding path program 1 times [2023-11-19 05:17:42,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:17:42,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015219099] [2023-11-19 05:17:42,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:17:42,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:17:42,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:17:43,470 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-11-19 05:17:43,470 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:17:43,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015219099] [2023-11-19 05:17:43,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015219099] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:17:43,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331693666] [2023-11-19 05:17:43,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:17:43,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:17:43,472 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d001a1a2-972a-4af1-9a2a-7491f21868b3/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:17:43,475 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d001a1a2-972a-4af1-9a2a-7491f21868b3/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:17:43,483 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d001a1a2-972a-4af1-9a2a-7491f21868b3/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 05:17:43,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:17:43,913 INFO L262 TraceCheckSpWp]: Trace formula consists of 1165 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-19 05:17:43,928 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:17:44,659 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2023-11-19 05:17:44,659 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:17:44,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331693666] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:17:44,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:17:44,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 10 [2023-11-19 05:17:44,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720913413] [2023-11-19 05:17:44,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:17:44,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 05:17:44,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:17:44,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 05:17:44,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2023-11-19 05:17:44,667 INFO L87 Difference]: Start difference. First operand 305 states and 401 transitions. Second operand has 7 states, 7 states have (on average 8.714285714285714) internal successors, (61), 5 states have internal predecessors, (61), 3 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2023-11-19 05:17:46,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:17:46,859 INFO L93 Difference]: Finished difference Result 442 states and 584 transitions. [2023-11-19 05:17:46,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 05:17:46,860 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.714285714285714) internal successors, (61), 5 states have internal predecessors, (61), 3 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) Word has length 121 [2023-11-19 05:17:46,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:17:46,864 INFO L225 Difference]: With dead ends: 442 [2023-11-19 05:17:46,864 INFO L226 Difference]: Without dead ends: 437 [2023-11-19 05:17:46,864 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2023-11-19 05:17:46,865 INFO L413 NwaCegarLoop]: 162 mSDtfsCounter, 64 mSDsluCounter, 511 mSDsCounter, 0 mSdLazyCounter, 428 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 673 SdHoareTripleChecker+Invalid, 429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 428 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-11-19 05:17:46,866 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 673 Invalid, 429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 428 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-11-19 05:17:46,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2023-11-19 05:17:46,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 436. [2023-11-19 05:17:46,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 436 states, 302 states have (on average 1.3211920529801324) internal successors, (399), 311 states have internal predecessors, (399), 85 states have call successors, (85), 47 states have call predecessors, (85), 48 states have return successors, (92), 83 states have call predecessors, (92), 84 states have call successors, (92) [2023-11-19 05:17:46,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 576 transitions. [2023-11-19 05:17:46,902 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 576 transitions. Word has length 121 [2023-11-19 05:17:46,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:17:46,903 INFO L495 AbstractCegarLoop]: Abstraction has 436 states and 576 transitions. [2023-11-19 05:17:46,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.714285714285714) internal successors, (61), 5 states have internal predecessors, (61), 3 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2023-11-19 05:17:46,904 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 576 transitions. [2023-11-19 05:17:46,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2023-11-19 05:17:46,906 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:17:46,906 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:17:46,934 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d001a1a2-972a-4af1-9a2a-7491f21868b3/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 05:17:47,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d001a1a2-972a-4af1-9a2a-7491f21868b3/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:17:47,120 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:17:47,120 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:17:47,120 INFO L85 PathProgramCache]: Analyzing trace with hash 799471968, now seen corresponding path program 1 times [2023-11-19 05:17:47,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:17:47,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045694408] [2023-11-19 05:17:47,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:17:47,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:17:47,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:17:47,811 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2023-11-19 05:17:47,812 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:17:47,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045694408] [2023-11-19 05:17:47,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045694408] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:17:47,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295687854] [2023-11-19 05:17:47,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:17:47,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:17:47,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d001a1a2-972a-4af1-9a2a-7491f21868b3/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:17:47,814 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d001a1a2-972a-4af1-9a2a-7491f21868b3/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:17:47,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d001a1a2-972a-4af1-9a2a-7491f21868b3/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 05:17:48,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:17:48,268 INFO L262 TraceCheckSpWp]: Trace formula consists of 1190 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-19 05:17:48,279 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:17:48,696 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2023-11-19 05:17:48,696 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:17:48,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295687854] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:17:48,696 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:17:48,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [5] total 12 [2023-11-19 05:17:48,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941294486] [2023-11-19 05:17:48,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:17:48,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-19 05:17:48,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:17:48,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-19 05:17:48,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2023-11-19 05:17:48,699 INFO L87 Difference]: Start difference. First operand 436 states and 576 transitions. Second operand has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 7 states have internal predecessors, (66), 5 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 5 states have call predecessors, (16), 4 states have call successors, (16) [2023-11-19 05:17:53,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:17:53,047 INFO L93 Difference]: Finished difference Result 569 states and 753 transitions. [2023-11-19 05:17:53,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-19 05:17:53,048 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 7 states have internal predecessors, (66), 5 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 5 states have call predecessors, (16), 4 states have call successors, (16) Word has length 125 [2023-11-19 05:17:53,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:17:53,053 INFO L225 Difference]: With dead ends: 569 [2023-11-19 05:17:53,054 INFO L226 Difference]: Without dead ends: 564 [2023-11-19 05:17:53,054 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2023-11-19 05:17:53,055 INFO L413 NwaCegarLoop]: 166 mSDtfsCounter, 286 mSDsluCounter, 547 mSDsCounter, 0 mSdLazyCounter, 743 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 713 SdHoareTripleChecker+Invalid, 769 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 743 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2023-11-19 05:17:53,056 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [290 Valid, 713 Invalid, 769 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 743 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2023-11-19 05:17:53,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2023-11-19 05:17:53,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 424. [2023-11-19 05:17:53,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 424 states, 295 states have (on average 1.3254237288135593) internal successors, (391), 303 states have internal predecessors, (391), 83 states have call successors, (83), 46 states have call predecessors, (83), 45 states have return successors, (82), 80 states have call predecessors, (82), 82 states have call successors, (82) [2023-11-19 05:17:53,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 556 transitions. [2023-11-19 05:17:53,115 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 556 transitions. Word has length 125 [2023-11-19 05:17:53,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:17:53,118 INFO L495 AbstractCegarLoop]: Abstraction has 424 states and 556 transitions. [2023-11-19 05:17:53,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 7 states have internal predecessors, (66), 5 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 5 states have call predecessors, (16), 4 states have call successors, (16) [2023-11-19 05:17:53,119 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 556 transitions. [2023-11-19 05:17:53,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2023-11-19 05:17:53,124 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:17:53,124 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:17:53,152 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d001a1a2-972a-4af1-9a2a-7491f21868b3/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 05:17:53,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d001a1a2-972a-4af1-9a2a-7491f21868b3/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:17:53,340 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:17:53,340 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:17:53,341 INFO L85 PathProgramCache]: Analyzing trace with hash -1263388119, now seen corresponding path program 1 times [2023-11-19 05:17:53,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:17:53,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304476185] [2023-11-19 05:17:53,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:17:53,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:17:53,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:17:54,072 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2023-11-19 05:17:54,073 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:17:54,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304476185] [2023-11-19 05:17:54,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304476185] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:17:54,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645972078] [2023-11-19 05:17:54,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:17:54,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:17:54,075 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d001a1a2-972a-4af1-9a2a-7491f21868b3/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:17:54,076 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d001a1a2-972a-4af1-9a2a-7491f21868b3/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:17:54,084 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d001a1a2-972a-4af1-9a2a-7491f21868b3/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 05:17:54,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:17:54,749 INFO L262 TraceCheckSpWp]: Trace formula consists of 1369 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-19 05:17:54,757 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:17:54,788 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2023-11-19 05:17:54,788 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:17:54,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1645972078] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:17:54,788 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:17:54,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2023-11-19 05:17:54,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3118443] [2023-11-19 05:17:54,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:17:54,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 05:17:54,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:17:54,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 05:17:54,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-19 05:17:54,791 INFO L87 Difference]: Start difference. First operand 424 states and 556 transitions. Second operand has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2023-11-19 05:17:56,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:17:56,457 INFO L93 Difference]: Finished difference Result 833 states and 1093 transitions. [2023-11-19 05:17:56,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 05:17:56,458 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 126 [2023-11-19 05:17:56,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:17:56,462 INFO L225 Difference]: With dead ends: 833 [2023-11-19 05:17:56,462 INFO L226 Difference]: Without dead ends: 431 [2023-11-19 05:17:56,463 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-19 05:17:56,464 INFO L413 NwaCegarLoop]: 168 mSDtfsCounter, 5 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 497 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-11-19 05:17:56,465 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 497 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-11-19 05:17:56,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2023-11-19 05:17:56,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 426. [2023-11-19 05:17:56,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 426 states, 297 states have (on average 1.3164983164983164) internal successors, (391), 305 states have internal predecessors, (391), 83 states have call successors, (83), 46 states have call predecessors, (83), 45 states have return successors, (82), 80 states have call predecessors, (82), 82 states have call successors, (82) [2023-11-19 05:17:56,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 556 transitions. [2023-11-19 05:17:56,512 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 556 transitions. Word has length 126 [2023-11-19 05:17:56,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:17:56,512 INFO L495 AbstractCegarLoop]: Abstraction has 426 states and 556 transitions. [2023-11-19 05:17:56,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2023-11-19 05:17:56,513 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 556 transitions. [2023-11-19 05:17:56,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2023-11-19 05:17:56,515 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:17:56,515 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:17:56,539 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d001a1a2-972a-4af1-9a2a-7491f21868b3/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 05:17:56,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d001a1a2-972a-4af1-9a2a-7491f21868b3/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-19 05:17:56,732 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:17:56,732 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:17:56,732 INFO L85 PathProgramCache]: Analyzing trace with hash -391006560, now seen corresponding path program 1 times [2023-11-19 05:17:56,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:17:56,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389093275] [2023-11-19 05:17:56,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:17:56,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:17:56,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:17:57,267 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2023-11-19 05:17:57,267 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:17:57,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389093275] [2023-11-19 05:17:57,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389093275] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:17:57,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462940110] [2023-11-19 05:17:57,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:17:57,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:17:57,269 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d001a1a2-972a-4af1-9a2a-7491f21868b3/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:17:57,270 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d001a1a2-972a-4af1-9a2a-7491f21868b3/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:17:57,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d001a1a2-972a-4af1-9a2a-7491f21868b3/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 05:17:57,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:17:57,939 INFO L262 TraceCheckSpWp]: Trace formula consists of 1386 conjuncts, 95 conjunts are in the unsatisfiable core [2023-11-19 05:17:57,960 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:17:57,994 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2023-11-19 05:17:58,299 WARN L876 $PredicateComparison]: unable to prove that (exists ((|#Ultimate.meminit_#ptr.base| Int)) (= (store |c_old(#memory_int)| |#Ultimate.meminit_#ptr.base| ((as const (Array Int Int)) 0)) |c_#memory_int|)) is different from true [2023-11-19 05:17:58,319 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2023-11-19 05:17:58,360 WARN L876 $PredicateComparison]: unable to prove that (let ((.cse0 ((as const (Array Int Int)) 0))) (and (exists ((|#Ultimate.meminit_#ptr.base| Int)) (= (store |c_old(#memory_int)| |#Ultimate.meminit_#ptr.base| .cse0) |c_#memory_int|)) (exists ((|#Ultimate.meminit_#ptr.base| Int)) (= .cse0 (select |c_#memory_int| |#Ultimate.meminit_#ptr.base|))))) is different from true [2023-11-19 05:17:58,400 INFO L349 Elim1Store]: treesize reduction 16, result has 23.8 percent of original size [2023-11-19 05:17:58,400 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 16 [2023-11-19 05:17:59,827 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-19 05:17:59,827 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 19 [2023-11-19 05:18:00,034 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-19 05:18:00,034 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 19 [2023-11-19 05:18:00,064 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-19 05:18:00,065 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 19 [2023-11-19 05:18:00,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:18:00,329 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-19 05:18:00,330 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 16 [2023-11-19 05:18:00,384 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 36 trivial. 5 not checked. [2023-11-19 05:18:00,384 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:18:00,528 WARN L854 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_usb_acecad_probe_~id#1.offset| Int) (v_ArrVal_522 (Array Int Int))) (let ((.cse0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_usb_acecad_probe_~input_dev~0#1.base| v_ArrVal_522) |c_ULTIMATE.start_usb_acecad_probe_~id#1.base|) (+ 16 |ULTIMATE.start_usb_acecad_probe_~id#1.offset|)))) (or (= .cse0 0) (= .cse0 1)))) is different from false [2023-11-19 05:18:00,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462940110] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:18:00,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [911550763] [2023-11-19 05:18:00,579 INFO L159 IcfgInterpreter]: Started Sifa with 92 locations of interest [2023-11-19 05:18:00,580 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 05:18:00,585 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 05:18:00,592 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 05:18:00,592 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs